CN106869633A - With the breech lock for crossing shock stop feature - Google Patents

Abstract

The invention provides the breech lock of vehicle closure plate, it includes：Breech lock housing；Ratchet, it is attached to breech lock housing and can be moved between closed and opened position, and the ratchet has the first and second parts and passage；Ratchet；And a pair of bars, it includes control-rod and arresting lever, and in rest home location, control-rod is aligned to be contacted with Part I, is easy to make ratchet be rotated with being combined with this pair of bar so as to overcome the bias of biased element in contact, for making：The rotation that ratchet exceedes predetermined speed threshold value causes common rotation, so that Part II is contacted with arresting lever, so that in preventing the impingement region excessively that striker advances to passage；And the rotation less than predetermined speed threshold value of ratchet causes misalignment into rotating jointly and preventing Part II from being contacted with arresting lever, consequently facilitating in making the impingement region excessively that striker advances to passage；Wherein, the predetermined speed threshold value is related to the biasing strength of biasing member.

Description

With the breech lock for crossing shock stop feature

Technical field

This disclosure relates to it is used for the breech lock of closure plate, and more specifically it relates to hood of vehicle breech lock.

Background technology

Breech lock for hood of vehicle and similar device is usual with two stage actuations.During in the first stage, Vehicle interior actuation handle, this makes breech lock move to secondary closed position from main closed position.In order to discharge breech lock completely, vehicle multiplies Member generally or out and can activate the bar below the hood from vehicle, or can during second stage from Vehicle interior enables handle (such as double drawings) and breech lock is moved to open position from secondary closed position.

With regard to the situation of common lifting hood and for being particularly used for the situation of active pedestrian protection system, Breech lock needs to provide the stroke (for example, striker overtravel the groove of breech lock in) bigger than being used for the stroke of normal opening.By In the mechanical restriction factor and the target of quality Package of spring, the normal lifting capacity for opening hood can not be as using master The lifting capacity that dynamic formula pedestrian protection system is provided is equally big.Shock was run into when being collided due to pedestrian and hood , it is necessary to breech lock automatically resets during situation.Also need to same breech lock and do not utilize the normal operating of additional travel (for example, non-mistake is clashed into Situation).

Auto industry attempts preferably protection pedestrian from making its head and vehicle central collision.When automobile is in head-on crash In when bumping against pedestrian, pedestrian can be tossed and fall on the front engine cover and/or windshield of vehicle.In order to improve collision The order of severity, and particularly for preventing its to engine cylinder-body or immediately below front engine cover of the butt of people Its hard position, it is desirable to which no matter when detect front end crash all makes between front engine cover and engine cylinder-body on one's own initiative Separate.

The content of the invention

It is an object of the invention to provide a kind of breech lock for eliminating or reducing at least some shortcomings in disadvantages mentioned above.

The first aspect for being provided is the breech lock of the closure plate for vehicle, and the breech lock includes：Breech lock housing；Ratchet, should Ratchet is attached to breech lock housing, and the ratchet can the closed position during striker to be maintained at ratchet the groove of breech lock housing with Moved between the open position that ratchet discharges striker from groove, the ratchet has for receiving the passage of striker and with phase Part I for passage and the Part II relative to passage, passage have and are positioned to the mistake adjacent with the bottom of passage and hit Hit (over slam) region；Ratchet, the ratchet is attached to breech lock housing, and can be maintained at for ratchet in ratchet by the ratchet Ratchet holding position and ratchet in closed position are easy to be transported between the ratchet release position for making ratchet be moved towards open position It is dynamic；And a pair of bars, the pair of bar is attached to breech lock housing and is configured to be rotated jointly (corotation) around pivot, institute State a pair of bars and be biased component towards rest home location (rest position) bias, wherein the biasing member is attached to described one To at least one of bar, the pair of bar includes the control-rod and arresting lever that are spaced apart from each other around pivot so that when being in During rest home location, control-rod is aligned to be contacted with Part I, consequently facilitating passing through when control-rod is contacted with Part I Overcome the bias of biased element and ratchet and a pair of bars is rotated (co-joint rotation) with being combined, for making：Ratchet The rotation more than predetermined speed threshold value cause common rotation so that Part II is contacted with arresting lever, so as to prevent striker row Enter crossing in impingement region for passage；And the rotation less than predetermined speed threshold value of ratchet causes misalignment to be rotated simultaneously into common And prevent Part II from being contacted with arresting lever, consequently facilitating in making the impingement region excessively that striker advances to passage；Wherein, pre- constant speed Degree threshold value is related to the biasing strength of biasing member.

Brief description of the drawings

Above-mentioned aspect and other side are described by way of example only now with reference to accompanying drawing, wherein, attached In figure：

Fig. 1 is the side view of vehicle；

Fig. 2 is the breech lock of the vehicle of Fig. 1 in an open position；

Fig. 3 is the breech lock of the vehicle of the Fig. 1 in position latching；

Fig. 4 is the breech lock of the vehicle of the Fig. 1 in secondary position latching；

Fig. 5 be in crash situation Fig. 1 breech lock；

Fig. 6 a, Fig. 6 b, Fig. 6 c, Fig. 6 d show the operating process of position latching of the breech lock from open position to Fig. 3；And

Fig. 7 a, Fig. 7 b, Fig. 7 c, Fig. 7 d show that breech lock crosses crash situation to showing in Fig. 2, Fig. 3, Fig. 4 from the breech lock of Fig. 5 Position in any position operating process.

Specific embodiment

Reference picture 1, Fig. 1 shows vehicle 11, and vehicle 11 has hood 13 (such as closure plate), on hood 13 It is provided with striker 22.The breech lock 10 that striker 22 can be installed on the vehicle body of vehicle 11 (being shown with 15) is captured.Passenger compartment 37 Automotive occupant in (Fig. 1) is by pulling handle 35 and (such as manually) activates release lever 16 for the first time so that by cable 33 Handle 35 is attached to release lever 16, this can be such that ratchet 14 is disconnected with ratchet 12.

Reference picture 2, breech lock 10 include ratchet 12, ratchet 14, release lever 16, arresting lever 40, control-rod or actuating rod 42 with And housing 20.As shown in Fig. 2 ratchet 12 is pivotably attached to housing 20 by pivot 25, and in normal operating Under, ratchet 12 can figure 3 illustrates main closed position, Fig. 4 in the secondary closed position (as shown in Figure 4) that shows and Fig. 2 Moved between the open position (as shown in Figure 2) for showing.Moving pivotally for ratchet 12 can be around (the figure of pin 25 for being attached to housing 20 2) carry out.In main closed position and secondary closed position, ratchet 12 prevents striker 22 from exiting fish mouth shape portion 23 so that striker 22 is pacified On other closure plates of hood of vehicle 13 or breech lock 10.When in main closed position, ratchet 12 protects striker 22 The entry position 48 held where when in the fish mouth shape portion of housing 20 than in secondary closed position is relatively deeper (positioned at entering for groove 23 At centre position 46 between mouth 44 and bottom 45), wherein, entry position 48 is higher than centre position 46 and thus than positioned at centre It is farther away from bottom 45 during position 46.Thus, in main closed position, striker 22 is maintained at ratchet 12 the fish mouth shape portion of housing 20 The first depth in 23, and in secondary closed position, be maintained at striker 22 in the fish mouth shape portion 23 of housing 20 by ratchet 12 The second depth.It should be appreciated that second the first depth of depth ratio is farther away from bottom 45.And should also be appreciated that second Depth can be below or above the entrance 44 of groove 23.

In one example, the body of ratchet 12 can have unci 8 (see Fig. 2), and unci 8 is used in ratchet 14 and ratchet 12 prevent striker 22 from being discharged from fish mouth shape portion 23 when being in the second place (see Fig. 4), wherein, striker 22 is from fish mouth shape The release of portion 23 is due to the following reasons generation：By release lever 16 (see Fig. 2) operation for make the misalignment of ratchet 14 into ratchet 12 On locking surface engagement but be aligned to then be engaged with the secondary locking surface on ratchet 12.Alternatively, unci 8 can Separated with the body with ratchet 12 and be connected to the vehicle body of vehicle 11, hood 13 and/or breech lock 10 housing 20 (or even It is connected to the part of the housing 20 of the vehicle body, hood 13 and/or breech lock 10 of vehicle 11).The secondary position restriction of ratchet 12 is to hit Following location of the pin 22 in fish mouth shape portion 23：This is located away from master site or latched position, while making striker 22 receive crook 8 limitations are divided to be unable to leave fish mouth shape portion 23 (that is, making breech lock 10 be in open mode).

Referring again to Fig. 2, ratchet 12 is set to be biased towards open position by ratchet biasing member 24.Ratchet biasing member 24 It such as can be torsionspring.The torsionspring can extend around pin 25 and can have first end 24a (Fig. 2) and second End, wherein, first end 24a (Fig. 2) is anchored in the groove of housing 20, and the second end is against the engagement member on ratchet 12 Or Spring holder 19 is acted on.Ratchet 14 is pivotably attached to housing 20, and ratchet 14 can be in main locking bit Put and moved between (Fig. 3), secondary latched position (Fig. 4) and unlocked position (Fig. 2).The pivoting action of ratchet 14 can be around pin 27 (Fig. 2) is carried out.In primary locking position (Fig. 3), the ratchet locking surface on ratchet 14 connects with the main locking surface on ratchet 12 Merge and ratchet 12 is maintained in main closed position, until discharging the ratchet 12 using the first release lever 16.In secondary locking bit Put in (Fig. 4), ratchet locking surface can engage with the main locking surface on ratchet 12 and ratchet 12 is maintained at into secondary close stance In putting, until discharging the ratchet 12 by enabling subtie or duplex pull rod 18.In unlocked position (Fig. 2), ratchet 14 causes spine Wheel 12 moves to open position due to not hindered by ratchet 14.Ratchet 14 is by ratchet biasing member 26 (Fig. 2) towards main locking Position biases.Ratchet biasing member 26 for example can be torsionspring.The torsionspring can extend around pin 27 and can be with With anchoring the second end and first end on the housing 20.

Referring again to Fig. 2, arresting lever 40 is pivoted jointly with control-rod 42 around pivot 50.It is anchored to the biasing member of housing 20 52 54 are biased away from ratchet 12 along clockwise direction.The body of ratchet 12 has unci 8 and crosses shock part 9, mistake Clashing into part 9 has contact portion 55, and contact portion 55 is configured to during the normal operating of breech lock 10 or crossed during clashing into operation Engaged with the contact portion 56 of control-rod 42.As further described below, in the normal operating of breech lock 10, by arresting lever 40 Striker 22 is prevented to be advanced between centre position 46 (see Fig. 3) and bottom 45.As further described below, in the mistake of breech lock 10 Clash into operation, make striker 22 be easy to be advanced between centre position 46 (see Fig. 3) and bottom 45.Just generally lift hood 13 situation and it is particularly used for for the situation of active pedestrian protection system, breech lock 10 needs to provide than being used for normal beating The bigger stroke (for example, the overtravel of striker 22 in the groove 23 of breech lock 10) of the stroke opened, wherein, active pedestrian protecting system System is considered to be a kind of appropriate collision conditions excessively.

Traveling when striker 22 is normally opened includes the travel range of following process corresponding to striker 22：From centre position 46 (see Fig. 3) advances to entry position 48 (see the secondary closed position of Fig. 4) and reaches open position 58 again (see the breech lock open position of Fig. 2 Put), and the process opposite when breech lock 10 is closed.Therefore, striker 22 via entry position 48 open position 58 with it is middle Stroke between position 46 is considered as the normal operation range of striker 22, and it is not using any overtravel (for example, striker 22 Stroke between the bottom 45 --- seeing Fig. 3 --- of centre position 46 and groove 23).Therefore, the normal operating (example of breech lock 10 Such as, except cross collision conditions in addition to situation) be the potential stroke for not utilizing striker 22 extra situation.

For crossing collision conditions, make use of striker 22 extra between the bottom 45 of centre position 46 and groove 23 Potential stroke so that striker 22 travel over centre position 46 and close to or otherwise contact bottom 45, referring to Fig. 5. It should be pointed out that it is as further described below, in the impingement position 60 excessively of striker 22, the unci 8 of ratchet 12 Contact surface 62 bypass the contact surface 64 of arresting lever 40.

Reference picture 6a, Fig. 6 b, Fig. 6 c, Fig. 6 d, shows that breech lock 10 is engaged with control-rod 42 in figure 6b by ratchet 12 And then engaged with arresting lever 40 in fig. 6 c and from the open position of Fig. 6 a (identical with Fig. 2) towards Fig. 6 d (with Fig. 3 phases The normal operating of position latching (for example, main closed position) together).When the contact with control-rod 42 of contact portion 55 of ratchet 12 When part 56 engages, the downward stroke by striker 22 in groove 23 overcomes biasing member 52 to control-rod 42 and the edge of arresting lever 40 The bias of 54 (see Fig. 2) clockwise.Thus, the continuation of contact portion 55,56 is engaged to cause and overcomes the inclined of biased element 52 Both press the work(of (for example, load of spring 52) makes control-rod 42 and arresting lever 40 around 66 rotation in the counterclockwise direction of pivot 50 Turn, to make the contact portion 62 of ratchet 12 that such as Fig. 6 c are engaged with the contact portion 64 of arresting lever 40.Reference picture 5, once stop The abutment surface 68 of bar 40 rotates around pivot 50 and is engaged with (for example, on housing 20) stop fitting 70, then inverse Conterclockwise rotation 66 is prevented from, thus prevents striker 22 from further being advanced (see Fig. 6 c) towards the bottom 45 of groove 23.Supporting Connect surface 68 and abut after stop part 70 engages, the bias of ratchet biasing member 24 make ratchet 12 around pivot 25 in the counterclockwise direction Rotation is disengaged contact portion 62,64 (see Fig. 6 d), consequently facilitating control-rod 42 and arresting lever 40 are in the inclined of stand under load Press rest home location rotations of 54 (see the Fig. 2) towards control-rod 42 and arresting lever 40 along clockwise direction under the bias effect of component 52 (see Fig. 6 d).As described above, the ratchet 12 in Fig. 6 d is now in the first position latching.

As described, the unci 8 of ratchet 12 prevents striker 22 from advancing to the mistake of groove 23 with the engagement of arresting lever 40 Impingement region --- that is, in centre position 46 and towards between the bottom 45 of groove --- any scope.And as described, In the case of the normal operating of breech lock 10, ratchet 12 makes the unci 8 of arresting lever 40 and ratchet 12 with the engagement of control-rod 42 Alignment, i.e. the activation control-rod 42 of ratchet 12 makes it be rotated around pivot 50 together with arresting lever 40, is attached to just as arresting lever 40 As the rotation of control-rod 42.It should be appreciated that the bias structure being pre-selected around the rotary speed of pivot 25 based on ratchet 12 The biasing strength (such as spring sizes) of part 52 causes that contact portion 62,64 is higher than predetermined threshold speed in rotary speed --- For example, being merged during the speed of the 1m/s being travel downwardly towards bottom 45 in groove 23 corresponding to striker 22 --- ---.Change Yan Zhi, under normal operation (for example, in the case of higher than predetermined threshold speed), according to the institute of biasing member 52 The spring constant scope of certain selected and the stroke speed of striker 22, arresting lever 40 can make ratchet 12 at power impact position Stopping is advanced around pivot 25, as fig. 6 c.If contact portion 62,64 engage when ratchet 12 around pivot 25 rotary speed with Arresting lever 40 matches around the rotary speed of pivot 50, and contact portion 55,56 can be made mutually to merge, and such case is in striker 22 Gait of march be likely to occur when being calibrated according to the following biasing strength of biasing member 52：The biasing strength corresponds to higher than pre- Determine the speed of threshold speed.

In the fortuitous event that pedestrian during pedestrian and vehicle 11 collide exerts oneself shock hood 13, can produce Less than the speed of threshold speed.As shown in figure 5, striker 22 is with the speed (for example, the speed less than 1m/s) less than threshold speed Urged downwards towards bottom 45.By this way, contact portion 55,56 engage cause control-rod 42 together with arresting lever 40 around The initial common rotation of 66 (see Fig. 6 b) in the counterclockwise direction of pivot 50, yet with the biasing strength of biasing member 52, crook Points 8 faster around the traveling of pivot 50 than arresting lever 40 around the traveling of pivot 25, thus contact portion 62,64 got around each other (for example, not up to be aligned), consequently facilitating striker 22 groove 23 cross shock travel zone in (i.e., as seen in Figure 5, in centre Between position 46 and bottom 45) advance.In other words, if ratchet 12 is fast around the rotation of pivot 25 when contact portion 62,64 is engaged Degree mismatches then contact portion 55,56 and will not mutually merge with arresting lever 40 around the rotary speed of pivot 50, and such case is in striker 22 gait of march occurs when being calibrated according to the following biasing strength of biasing member 52：The biasing strength corresponds to less than pre- Determine the speed of threshold speed.

It should also be appreciated that the substituting configuration of the breech lock 10 of following bar 40,42, the bar 40,42 energy can be had It is enough to cause in the case where the position around its pivot of bar 40,42 is opposite control-rod 42 and arresting lever 40 54 quilt along clockwise direction Bias (not shown).Therefore, when the contact portion 55 of ratchet 12 is engaged with the contact portion 56 of control-rod 42, biased element 52 Downward traveling by striker 22 in groove 23 overcomes.Pedestrian exerts oneself to clash into engine during pedestrian and vehicle 11 collide There may be the speed less than threshold speed in the fortuitous event of cover 13.Striker 22 can be with the speed (example less than threshold speed Such as, the speed less than 1m/s) urged downwards towards bottom 45.By this way, contact portion 55,56 is engaged and makes control-rod 42 rotate 66 initial collaborations in the counterclockwise direction together with arresting lever 40 around pivot 50, yet with the bias of biasing member 52 Intensity, unci 8 can be faster around the traveling of pivot 50 than arresting lever 40 around the traveling of pivot 25, thus contact portion 62, 64 can avoid (for example, being not up to aligned) each other, consequently facilitating striker 22 is advanced (i.e., in the shock travel zone excessively of groove 23 As seen in Figure 5, advanced between centre position 46 and bottom 45).If additionally, contact portion 62,64 engage when ratchet 12 around The rotary speed of pivot 25 and arresting lever 40 can mutually merge around the rotary speed of pivot 50 so contact portion 55,56 that matches, Such case occurs that the bias is strong when the gait of march of striker 22 is calibrated according to the following biasing strength of biasing member 52 Degree corresponds to the speed higher than predetermined speed threshold value.

So, the breech lock 10 for the closure plate 13 of vehicle 11 can include breech lock housing 20, ratchet 12 and ratchet 14, Wherein, ratchet 12 is attached to breech lock housing 20, and striker 22 can be maintained at breech lock housing 20 by ratchet 12 in ratchet 12 The open position that closed position (main closed position or secondary closed position) in groove 23 discharges striker 22 with ratchet 12 from groove 23 Moved between putting, ratchet 12 has for receiving the passage 70 (see Fig. 2) of striker 22 and with first relative to passage 70 The Part II 8 of part 9 and opposing channel 70, passage 70 has the impingement region excessively for being positioned to adjacent with the bottom 45 of passage 70 72 (see Fig. 2), ratchet 14 is attached to breech lock housing 20, and ratchet 14 can ratchet holding position and ratchet release position it Between move, in ratchet holding position, during be maintained in its closed position for ratchet 12 by ratchet 14, in ratchet release position, ratchet 14 are easy to make ratchet 12 be moved towards open position.

A pair of bars 40,42 are additionally provided with, this pair of bar 40,42 is attached to breech lock housing 20 and is configured to common around pivot 50 Rotation, this pair of bar 40,42 is biased component 52 and is biased towards rest home location, and wherein biasing member 52 is attached to this pair of bar 40,42 At least one of, this pair of bar includes the control-rod 42 and arresting lever 40 that are spaced apart from each other around pivot 50 so that when in resting upon During position, control-rod 42 is aligned to be contacted with Part I 9, so that when coming in contact by overcoming the inclined of biased element 52 Press and be easy to make ratchet 12 be rotated with being combined with this pair of bar 40,42, for making：1) rotation of the ratchet 12 higher than predetermined speed threshold value Turn that common rotation will be caused, so that Part II 8 is contacted with arresting lever 40, so that the mistake for preventing striker 22 from advancing to passage 70 is hit Hit in region 72；And 2) ratchet 12 will cause misalignment into rotating jointly and prevent the less than the rotation of predetermined speed threshold value Two parts 8 contact with arresting lever 40, consequently facilitating striker 22 is advanced into the impingement region 72 excessively of passage 70；Wherein, it is described Predetermined speed threshold value is related to the biasing strength of biasing member 52.

Reference picture 7a, Fig. 7 b, Fig. 7 c, Fig. 7 d, show after the mistake crash situation for reaching Fig. 5 the replacement of breech lock 10 and with Opening afterwards.Breech lock 10 in Fig. 7 a is in the positions/conditions identical positions/conditions with the breech lock 10 in Fig. 5, that is, cross and clash into State.The breech lock 10 of Fig. 7 b is in the state identical state with the breech lock 10 in Fig. 3.The breech lock 10 of Fig. 7 c be in Fig. 4 in Breech lock 10 state identical state.The breech lock 10 of Fig. 7 d is in the state identical state with the breech lock 10 in Fig. 2.Should , it is noted that breech lock 10 from the mistake crash situation of Fig. 7 a transit to Fig. 7 b main closing or position latching latch mode when, Ratchet 12 is easy to the He of control-rod 42 around the rotation (i.e. striker 22 is moved away from bottom 45) of pivot 25 (such as in the counterclockwise direction) Arresting lever 40 rotates jointly around pivot 50 (for example, along clockwise direction), so that arresting lever 40 and control-rod 42 are back to it Rest home location (see Fig. 7 b).Rest home location can be defined as such position：It is downward towards bottom 45 in groove 23 in striker 22 Before contact portion 55,56 is engaged during traveling, control-rod 42 and arresting lever 40 are around the position of pivot 50.Biasing member 52 (for example, Be in the biasing member 52 that crash situation is loaded) bias can be easy to the promotion to make control-rod 42 and arresting lever 40 around pivot Axle 50 rotates jointly from the collision conditions/state of crossing of breech lock 10 towards rest home location.Alternatively or in addition, when ratchet 12 is around pivot When axle 25 is away from impingement position is crossed towards the rotation of the first position latching, part 8,9 and control-rod 42 and/or the arresting lever of ratchet 12 One of 40 or furthermore contact can be easy to promote make control-rod 42 and arresting lever 40 be clashed into from crossing for breech lock 10 around pivot 50 Situation/state rotates jointly towards rest home location.As shown in figs. 7 c and 7d, once control-rod 42 and arresting lever 40 are in and rest upon During position, the operation of the breech lock 10 carried out by release lever 16,18 can be used in operating breech lock 10 to secondary closed position and/or Open position.It should be appreciated that main position latching (Fig. 3, Fig. 7 b), secondary door bolt ought be back to from impingement position (Fig. 5, Fig. 7 a) is crossed When any one of lock position (Fig. 4, Fig. 7 c) or open position (Fig. 2, Fig. 7 d), control-rod 42 and arresting lever 40 are in and rest upon position Put, and discussed as explained above with Fig. 6 a to Fig. 6 d, in the case where speed is less than predetermined threshold, when the quilt of hood 13 When pressing down on and striker 22 is advanced in groove 23, control-rod 42 and arresting lever 40 are therefore at preventing breech lock 10 from being back to Such position of impingement position (Fig. 5, Fig. 7 a).

It should be appreciated that with reference to pair breech lock 10 of pull-type (or the list of the second stage with manual releasing is pull-type) construction only The following operation of control-rod 42 and arresting lever 40 discussed above has been illustrated by way of example：1) row of striker 22 is prevented Enter in the impingement area excessively that groove 23 is provided (Fig. 6 a to Fig. 6 d)；2) striker 22 is allowed to advance to the shock excessively that groove 23 is provided In scope (Fig. 5, Fig. 7 a)；And allow striker to return to (Fig. 7 a that advance towards position latching or open position from impingement position is crossed To Fig. 7 d).It should also be appreciated that the unci 8 of ratchet 12 can be configured so as to be engaged with arresting lever 40, while providing use The breech lock for making single phase release breech lock (is operated to open position from position latching and operated to position latching from open position And have no and be provided with the second middle position latching).

Claims (8)

1. a kind of breech lock of closure plate for vehicle, the breech lock includes：

Breech lock housing；

Ratchet, the ratchet is attached to the breech lock housing, and the ratchet can be between closed position and open position Motion, in the closed position, be maintained at striker in the groove of the breech lock housing by the ratchet, in the open position In, the ratchet discharges the striker from the groove, and the ratchet has for receiving the passage of the striker and having Have a Part I and the Part II relative to the passage relative to the passage, the passage have be positioned to it is described The bottom of passage it is adjacent cross impingement region；

Ratchet, the ratchet is attached to the breech lock housing, and the ratchet can discharge in ratchet holding position and ratchet Moved between position, in the ratchet holding position, be maintained at the ratchet in the closed position by the ratchet, in institute State in ratchet release position, the ratchet is easy to make the ratchet be moved towards the open position；And

A pair of bars, the pair of bar is attached to the breech lock housing and is configured to be rotated jointly around pivot, the pair of bar quilt Biasing member is biased towards rest home location, and the biasing member is attached at least one of the pair of bar, the pair of bar Including the control-rod and arresting lever that are spaced apart from each other around the pivot so that when in the rest home location, the control Bar is aligned to be contacted with the Part I, consequently facilitating when the control-rod is contacted with the Part I by overcoming The bias of the biased element and the ratchet is rotated with being combined with the pair of bar, for making：

The rotation that the ratchet exceedes predetermined speed threshold value causes the common rotation, is used to make the Part II stop with described Lever is contacted, so as to prevent the striker from advancing to the described of the passage cross in impingement region；And

The rotation less than predetermined speed threshold value of the ratchet causes misalignment into the common rotation and prevents described second Part contacts with the arresting lever, consequently facilitating the striker is advanced to the described of the passage crossing in impingement region；

Wherein, the predetermined speed threshold value is related to the biasing strength of the biasing member.

2. breech lock according to claim 1, wherein, the closed position is divided into main closed position and secondary closed position.

3. breech lock according to claim 2, wherein, the Part II is the unci extended from bottom, and institute Part I is stated to extend from bottom and relative with the Part II.

4. breech lock according to claim 2, also including the master for being discharged into the ratchet in the secondary closed position Release lever and the duplex pull rod for being discharged into the ratchet in the open position.

5. breech lock according to claim 1, also including the ratchet on the side of the groove and installed in the groove Opposite side on a pair of bars so that the ratchet is opposite each other with the rotation being combined of the pair of bar.

6. breech lock according to claim 1, wherein, described cross impingement region and towards the groove when the striker is left When entrance is returned, the biasing strength of the biasing member causes that the pair of bar is back to the rest home location.

7. breech lock according to claim 1, wherein, by connecing for the alignment between the Part II and the arresting lever Touch and the rotation that is combined and be easy to make the pair of bar be back to the rest home location.

8. breech lock according to claim 1, wherein, the closure plate is the hood of vehicle.